SteerWriter.h

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/******************************************************************************
 *   Copyright (C) 2019 GSI Helmholtzzentrum für Schwerionenforschung GmbH    *
 *   Copyright (C) 2019-2023 Members of R3B Collaboration                     *
 *                                                                            *
 *             This software is distributed under the terms of the            *
 *                 GNU General Public Licence (GPL) version 3,                *
 *                    copied verbatim in the file "LICENSE".                  *
 *                                                                            *
 * In applying this license GSI does not waive the privileges and immunities  *
 * granted to it by virtue of its status as an Intergovernmental Organization *
 * or submit itself to any jurisdiction.                                      *
 ******************************************************************************/
 
#pragma once
 
#include <cstdint>
#include <fmt/core.h>
#include <fmt/format.h>
#include <fstream>
#include <map>
#include <string>
#include <string_view>
#include <unordered_map>
#include <utility>
#include <vector>
 
constexpr auto DEFAULT_MILLEPEDE_PARAMETER_FILE = "parameters.txt";
constexpr auto DEFAULT_STEER_FILENAME = "steer.txt";
constexpr auto DEFAULT_DATA_FILENAME = "data.bin";
 
namespace R3B
{
    class SteerWriter
    {
      public:
        enum class Method : uint8_t
        {
            inversion,
            diagonalization,
            fullGORES,
            sparseGMRES,
            cholesky,
            bandchooseby,
            HIP
        };
 
        SteerWriter() = default;
        void set_filepath(std::string_view filepath) { filepath_ = filepath; }
        void set_data_filepath(std::string_view filepath) { data_filepath_ = filepath; }
        void set_parameter_file(std::string_view filename) { parameter_file_ = filename; }
        void set_working_dir(std::string_view dir) { working_dir_ = dir; }
 
        void add_parameter_default(int par_num, const std::pair<float, float>& values);
        void add_method(Method method, const std::pair<float, float>& values);
        void add_other_options(std::vector<std::string> options);
 
        void write();
 
        static constexpr auto convert_method_to_str(Method) -> std::string_view;
 
      private:
        std::map<Method, std::pair<float, float>> methods_;
        std::string filepath_ = DEFAULT_STEER_FILENAME;
        std::string parameter_file_ = DEFAULT_MILLEPEDE_PARAMETER_FILE;
        std::string data_filepath_ = DEFAULT_DATA_FILENAME;
        std::unordered_map<int, std::pair<float, float>> parameter_defaults_;
        std::vector<std::vector<std::string>> other_options_;
        std::string working_dir_ = ".";
 
        void write_parameter_defaults();
        void write_data_file(std::ofstream& ofile);
        void write_methods(std::ofstream& ofile);
        void write_others(std::ofstream& ofile);
    };
 
} // namespace R3B
 
template <>
class fmt::formatter<R3B::SteerWriter::Method>
{
  public:
    static constexpr auto parse(format_parse_context& ctx) { return ctx.end(); }
    template <typename FmtContent>
    constexpr auto format(const R3B::SteerWriter::Method& method, FmtContent& ctn) const
    {
        return fmt::format_to(ctn.out(), "{}", R3B::SteerWriter::convert_method_to_str(method));
    }
};